# std::feupdateenv

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< cpp‎ | numeric‎ | fenv

Defined in header `<cfenv>` |  |
int feupdateenv( const std::fenv_t* envp ) |  | (since C++11)

First, remembers the currently raised floating-point exceptions, then restores the floating-point environment from the object pointed to by `envp` (similar to std::fesetenv), then raises the floating-point exceptions that were saved.

This function may be used to end the non-stop mode established by an earlier call to std::feholdexcept.

### Parameters

envp | - | pointer to the object of type std::fenv_t set by an earlier call to std::feholdexcept or `std::fegetenv` or equal to FE_DFL_ENV

### Return value

​0​ on success, non-zero otherwise.

### See also

feholdexcept (C++11) | saves the environment, clears all status flags and ignores all future errors (function)
fegetenvfesetenv (C++11) | saves or restores the current floating-point environment (function)
FE_DFL_ENV (C++11) | default floating-point environment (macro constant)
C documentation for feupdateenv

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